exclusive cassette

VCR allows cassettes to be nested. This is particularly useful in
a context like cucumber, where you may be using a cassette for an
entire scenario, and also using a cassette within a particular step
definition.

By default, both the inner and outer cassettes are active. On each
request, VCR will look for a matching HTTP interaction in the inner
cassette, and it will use the outer cassette as a fall back if none
can be found.

If you do not want the HTTP interactions of the outer cassette considered,
you can pass the :exclusive option, so that the inner cassette is
used exclusively.